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Which of the following instruction/s is/are used to return back to the main program after the subroutine is completed?

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Which of the following instruction/s is/are used to return back to the main program after the subroutine is completed?

(a) ret

(b) reti

(c) ret and reti

(d) none of the mentioned

This question was posed to me in a dream while sleeping

Question is from Functions and Subroutine topic in chapter MSP430 Microcontroller of Microcontroller

1 Answer

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by (24.2k points)
Right option is (c) ret and reti

Easiest explanation: For returning back from the subroutine, both ret and reti can be used, the main difference between the two is that reti just resets the interrupt flag before the return, so that the interrupt can occur again.

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